I need to make sum/total function(math) of child row and put the result on parent row.
But there is a header(string before total on child), should be like this:
A $100 $30
id name1 name 2
a1 $90 $20
a2 $10 $10
B $10 $14
id name1 name 2
b1 $5 $8
b2 $5 $6
Is there anyone ever make like this? I really need your help… 